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Mungenyi pegmatite, Ankole pegmatite field, Mbarara District, Western Region, Ugandai
Regional Level Types
Mungenyi pegmatitePegmatite
Ankole pegmatite fieldPegmatite Field
Mbarara DistrictDistrict
Western RegionRegion
UgandaCountry

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Latitude & Longitude (WGS84): 0° 58' 20'' South , 30° 11' 20'' East
Latitude & Longitude (decimal): -0.97222,30.18889
GeoHash:G#: kxv6qznbk
Locality type:Pegmatite
Köppen climate type:Af : Tropical rainforest climate
Nearest Settlements:
PlacePopulationDistance
Ntungamo15,300 (2016)13.3km
Nyachera30,509 (2016)26.6km
Rukungiri14,000 (2016)31.1km
Kabale43,500 (2016)37.8km
Kanungu14,600 (2016)44.4km


Pegmatite mined for beryl.

From Gallagher and Atkin (1966):
The main Mungenyi pegmatite is about 70 ft wide and 200 ft long, and is composed of a core of massive perthitic feldspar (with minor quartz and muscovite) surrounded by decomposed albite with small amounts of quartz, perthitic feldspar, muscovite and beryl. The beryl occurs mainly near the margins of the core, forming greenish-coloured crystals up to 10 cm across. Aggregates of plumose muscovite up to 4 ft in length are conspicuous in the beryl-bearing unit.

Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: American Mineralogist (1967): 52: 560.
Beryl
Formula: Be3Al2(Si6O18)
Reference: Gallagher, M.J., Atkin, D. (1966) Meta-ankoleïte, hydrated potassium uranyl phosphate. Bulletin of the Geological Survey of Great Britain: 25: 49-54.
Grayite
Formula: (Th,Pb,Ca)(PO4) · H2O
Reference: Gallagher, M.J. (1967): Phosphates and other minerals in pegmatites of Rhodesia and Uganda. Mineralogical Magazine. 36, 50-59
Meta-ankoleite (TL)
Formula: K2(UO2)2(PO4)2 · 6H2O
Type Locality:
Reference: American Mineralogist (1967): 52: 560.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: American Mineralogist (1967): 52: 560.
Phosphuranylite
Formula: (H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Reference: Gallagher, M.J. (1967): Phosphates and other minerals in pegmatites of Rhodesia and Uganda. Mineralogical Magazine. 36, 50-59
Quartz
Formula: SiO2
Reference: American Mineralogist (1967): 52: 560.
Zircon
Formula: Zr(SiO4)
Reference: Gallagher, M.J. (1967): Phosphates and other minerals in pegmatites of Rhodesia and Uganda. Mineralogical Magazine. 36, 50-59

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Grayite8.CJ.45(Th,Pb,Ca)(PO4) · H2O
Meta-ankoleite (TL)8.EB.15K2(UO2)2(PO4)2 · 6H2O
Phosphuranylite8.EC.10(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Beryl9.CJ.05Be3Al2(Si6O18)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Zircon9.AD.30Zr(SiO4)

List of minerals arranged by Dana 8th Edition classification

Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Meta-ankoleite (TL)40.2a.8.1K2(UO2)2(PO4)2 · 6H2O
(AB)5(XO4)2·xH2O
Grayite40.4.7.4(Th,Pb,Ca)(PO4) · H2O
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Phosphuranylite42.4.8.1(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)

List of minerals for each chemical element

HHydrogen
H Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
H Grayite(Th,Pb,Ca)(PO4) · H2O
BeBeryllium
Be BerylBe3Al2(Si6O18)
OOxygen
O Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O AlbiteNa(AlSi3O8)
O Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
O Grayite(Th,Pb,Ca)(PO4) · H2O
O ZirconZr(SiO4)
O BerylBe3Al2(Si6O18)
NaSodium
Na AlbiteNa(AlSi3O8)
AlAluminium
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al AlbiteNa(AlSi3O8)
Al BerylBe3Al2(Si6O18)
SiSilicon
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si AlbiteNa(AlSi3O8)
Si ZirconZr(SiO4)
Si BerylBe3Al2(Si6O18)
PPhosphorus
P Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
P Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
P Grayite(Th,Pb,Ca)(PO4) · H2O
KPotassium
K Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
K Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
CaCalcium
Ca Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Ca Grayite(Th,Pb,Ca)(PO4) · H2O
ZrZirconium
Zr ZirconZr(SiO4)
PbLead
Pb Grayite(Th,Pb,Ca)(PO4) · H2O
ThThorium
Th Grayite(Th,Pb,Ca)(PO4) · H2O
UUranium
U Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
U Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Mesoproterozoic
1000 - 1600 Ma



ID: 3306462

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Sedimentary

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Ectasian - Paleoproterozoic
1200 - 2500 Ma



ID: 3184636
Paleoproterozoic-Mesoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1200 - 2500 Ma)

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Gallagher, M.J., Atkin, D. (1966) Meta-ankoleïte, hydrated potassium uranyl phosphate. Bulletin of the Geological Survey of Great Britain: 25: 49-54.
Gallagher, M.J. (1967) Phosphates and other minerals in pegmatites of Rhodesia and Uganda. Mineralogical Magazine: 36: 50-59.


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